Application planning
6.7 Use in harsh environments:
3VL molded-case circuit breakers
80 System Manual, 03/2009, 110 0110 - 02 DS 01
Thermomagnetic TM trip units
Figure 6-6 Thermomagnetic TM
–25 °C to +50 °C, ☂ 95%
The SENTRON VL thermomagnetic trip units are designed for use in ambient temperatures
up to 70 °C and a non-condensing humidity level up to 95%. The appropriate correction
factors must be applied for ambient temperatures above 50 °C.
Electronic trip unit ETU
Figure 6-7 Standard ETU
-25 °C to +70 °C, ☂ 95%
The SENTRON VL electronic trip units are designed for use in ambient temperatures up to
70 °C and a non-condensing humidity level up to 95%. The appropriate correction factors
must be applied for ambient temperatures above 50 °C.
Electronic trip unit LCD ETU
Figure 6-8 LCD-ETU
-25 °C to +70 °C, ☂ 95%
The high-quality SENTRON VL electronic trip units are designed for use in ambient
temperatures up to 70 °C and a non-condensing humidity level up to 95%. The appropriate
correction factors must be applied for ambient temperatures above 50 °C.
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